Pain Management Procedures
Piriformis Muscle Injection
Piriformis Muscle Injection
What is it?
The piriformis is a deep buttock muscle located close to the sciatic nerve. In some patients, spasm, inflammation, or scarring around this muscle can cause deep buttock pain and sciatica-like symptoms. A piriformis injection places medication into the muscle or around the nearby sciatic nerve to help diagnose and treat this pain source.
When may it be recommended?
Piriformis syndrome is uncommon and can resemble a lumbar disc problem, SI-joint pain, hip disease, or another deep-gluteal condition. Injection is generally considered after examination and appropriate imaging or testing have excluded more common causes and after stretching, activity changes, medication, or physical therapy have not provided enough relief.
What happens?
You lie face down. Ultrasound or fluoroscopy identifies the piriformis, pelvic bones, and sciatic nerve. After skin numbing, a needle is guided into the muscle or perisciatic area. Local anesthetic and corticosteroid are commonly used; botulinum toxin is an option in selected cases.
What should I expect?
The buttock or leg may feel temporarily numb or weak. A responsible driver may be required. A clear short-term improvement can support the diagnosis, while longer relief may take several days. Exercise and movement retraining remain important.
Important risks
Risks include bleeding, infection, medication reaction, temporary leg weakness, sciatic-nerve irritation or injury, and local-anesthetic toxicity. Botulinum toxin can cause more prolonged weakness. Seek prompt care for new major weakness, loss of bladder or bowel control, or signs of infection.
Preparing for your injection procedure…
Your instructions will depend on the procedure. Before any injection, tell the APG team if you:
Take aspirin, warfarin, clopidogrel, apixaban, rivaroxaban, or another medicine or supplement that affects bleeding. Never stop a prescribed blood thinner unless the clinician who manages it and the procedure team tell you how to do so safely.
Have diabetes, glaucoma, a bleeding disorder, an active infection, fever, or recent antibiotic treatment.
Could be pregnant, have an allergy to contrast dye or local anesthetic, or have reacted to steroid injections before.
Use an implanted pacemaker, defibrillator, spinal cord stimulator, or other electrical device.
Some procedures require fasting, a medication adjustment, or a responsible adult to drive you home, especially when sedation is planned. Follow the instructions provided for your specific appointment.
After your injection procedure…
Most injections are outpatient procedures. Mild soreness, bruising, temporary numbness, or a brief increase in the usual pain can occur. Follow the activity and bandage instructions you receive. Steroid medicine may take several days to have an effect and can temporarily raise blood sugar.
Call the office promptly for increasing redness, drainage, fever, severe or rapidly worsening pain, or new numbness or weakness. Seek emergency care for trouble breathing, chest pain, sudden loss of bladder or bowel control, a severe new headache, loss of vision, stroke-like symptoms, or rapidly progressing weakness.
This information is for general education and does not replace medical advice, diagnosis, or treatment. Not every procedure is appropriate for every patient, and results vary. Your APG care team will review your symptoms, examination, imaging, medical history, medications, and prior treatment before recommending a plan. Coverage requirements also vary by insurance plan.